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What is happening on 2323/TCP?

Published: 2016-10-07
Last Updated: 2016-10-07 03:04:30 UTC
by Rick Wanner (Version: 1)
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A number of sources, including DShield, have noticed an uptick on port 2323 TCP beginning around 3 weeks ago.

This is the scanner portion of the Mirai botnet scanning for IoT devices on both 23/TCP and 2323/TCP.   There are a number of IoT devices that use port 2323/TCP as an alternate port for Telnet.  Those who have setup listeners on port 2323 are seeing brute force credential attacks utilizing a small dictionary.

The Mirai botnet iwas used to attempt to DDOS Brian Krebs website i and ifor the nearly 1 Tbps DDOS against OVH in late September

 

-- Rick Wanner MSISE - rwanner at isc dot sans dot edu - http://namedeplume.blogspot.com/ - Twitter:namedeplume (Protected)

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